Weather in St. Louis, Missouri, United States in August
In an average August, St. Louis sees a daily high around 88°F and a low around 67°F, based on 1981–2026 of local climate records.
| Average high | 88°F |
|---|---|
| Typical high range | 80°F to 96°F |
| Average low | 67°F |
| Typical low range | 59°F to 74°F |
| Average daily precipitation | 0.10 in |
August records
The most extreme August on record for each metric, across 1981–2026. For rainfall, the wettest and driest are by total August accumulation.
High
Highest
106°F
1984-08-29
Lowest
70°F
2004-08-12
Low
Highest
79°F
2010-08-10
Lowest
47°F
1986-08-29
Feels-like
Highest
152°F
2023-08-20
Lowest
42°F
1986-08-28
Humidity
Highest
24.6 g/m³
2019-08-20
Lowest
6.4 g/m³
1986-08-28
Wind
Highest
21 mph
2007-08-20
Lowest
4 mph
2005-08-15
Precip
Wettest
7.09 in
2016
Driest
0.68 in
2025
See St. Louis's live weather grade →
Visiting St. Louis in August? See how its comfort stacks up against where you live.
Compare St. Louis with your city →